Transcript Fire Extinguishers

Fire Extinguishers
SECTION: Tools and Equipment
ISSUED: 02-2011
REVISED: ##-####
Objectives
• To provide an understanding of the
following
– Specifications
– Use
– Maintenance
– Safety
Pressurized Water Extinguisher
Specifications
• Stainless steel shell
• 2A Rating
• 2 ½ gallons of water
– 1 to 2 oz of class A foam
• 100 psi operating pressure
• 45’ to 55’ discharge range
• 50 second discharge time
Use
• Small class A fires
– Ordinary combustibles
Maintenance
• After use
– Fill 2/3 with water
• Fill to bottom of white internal sleeve
– Add 1-2 oz. of class A foam
– Pressurize to 100 psi via Schrader valve
• Inspected annually by certified company
• Hydrostatically tested every 5 years at 200 psi
Dry Chemical Extinguisher
Specifications
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Steel shell
20A:120BC rating
Mono-Ammonium Phosphate base chemical
Pressurized to 195 psi
20 lbs of extinguishing agent
Discharge Range – 15’-25’
Use
• Class A fires
– Ordinary combustibles
• Class B fires
– Gasoline, diesel, alcohols, ect.
– Effective up to 120 square feet
– Based on a non expert use
• Class C fires
– Does not conduct electricity
Maintenance
• Serviced by certified company
• Inspected annually by certified company
• Hydrostatically tested every 5 years at 585 psi
• Shake monthly to avoid caking
Carbon Dioxide Extinguisher
Specifications
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Aluminum shell
10B:C rating
Carbon Dioxide
1800 psi operating pressure
15 lbs extinguishing agent
39 lbs gross weight
Discharge range – 3’-8’
Use
• Class B fires
– Gasoline, diesel, alcohols, ect.
• Class C fires
– Does not conduct electricity
Maintenance
• Serviced by a certified company
– 10% loss in gross weight requires service
• Inspected annually by certified company
• Hydrostatically tested every 5 years at
3000 psi
General Maintenance of
Extinguishers
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Inspect extinguisher daily
Check for leaks, dents, and corrosion
Check condition of hose and nozzle
Ensure valve assembly is tight
Ensure extinguisher is full
Ensure extinguisher is fully pressurized
Ensure annual inspection date is current
Ensure hydrostatic test date is current
Safety
• Use appropriate PPE
• Know extinguisher’s limitations
• Use appropriate extinguisher for specific
class of fire
• CO2 is a simple asphyxiate
• Hoisting extinguishers is not recommended